Platform sharing

Car companies are looking for economies , coz it is very difficult for them to make different cars and provide the backup and support for each car individually throughout its life cycle,Coz if a car fails in the market,It becomes difficult or rather unnecessary to provide backup for its service and parts throughout its life cycle.
I am a bit late about writing this post,but am writing it now because global car makers are getting this technology to india because the market has reached a level where if necessary to survive requires a degree of platform sharing among the cars of a same brand.
The the new swift dezire or the tata indigo for instance, the share more that half the part with their hatchback counterparts,This allows the companies to make parts simultaneously fot both the hatchback and the sedan, greater similar parts results in better manufacturing quality and thus higher quality.
The company which pioneered platform sharing in india was Fiat thought they could never succeed in it because of their sales network.Fiat lunched the siena in indian in the mid nineties,though a gr8 car,siena like palio had a good start in the indian market but eventually failed.
Tata got the indica and now has expanded it into 3 platforms the indigo and the indigo/marina.
European car maker have followed this strategy for more than a decade and have been increasingly profitable.